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DPCLK3 参数 Datasheet PDF下载

DPCLK3图片预览
型号: DPCLK3
PDF下载: 下载PDF文件 查看货源
内容描述: 的Cyclone III器件手册 [Cyclone III Device Handbook]
分类和应用:
文件页数/大小: 274 页 / 7302 K
品牌: ALTERA [ ALTERA CORPORATION ]
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5–30  
Chapter 5: Clock Networks and PLLs in the Cyclone III Device Family  
PLL Reconfiguration  
Figure 5–23 shows the scan chain bit order sequence for one PLL post-scale counter in  
Cyclone III device family PLLs.  
Figure 5–23. Scan Chain Bit Order  
HB  
8
HB  
6
HB  
5
HB  
1
HB  
3
HB  
7
HB  
9
HB  
0
HB  
2
HB  
4
DATAIN  
rbypass  
rselodd  
LB  
5
LB  
0
LB  
1
LB  
2
LB  
3
LB  
4
LB  
6
LB  
7
LB  
8
LB  
9
DATAOUT  
f
For more information about the PLL scan chain, refer to the Implementing PLL  
Reconfiguration in Cyclone III Devices application note.  
Charge Pump and Loop Filter  
You can reconfigure the charge pump and loop filter settings to update the PLL  
bandwidth in real time. Table 5–5 through Table 5–7 list the possible settings for  
charge pump (ICP), loop filter resistor (R), and capacitor (C) values for Cyclone III  
device family PLLs.  
Table 5–5. Charge Pump Bit Control  
CP[2]  
CP[1]  
CP[0]  
Setting (Decimal)  
0
0
0
1
0
0
1
1
0
1
1
1
0
1
3
7
Table 5–6. Loop Filter Resistor Value Control  
Setting  
(Decimal)  
LFR[4]  
LFR[3]  
LFR[2]  
LFR[1]  
LFR[0]  
0
0
0
0
1
1
1
1
1
1
1
0
0
0
1
0
0
0
1
1
1
1
0
0
1
0
0
0
1
0
0
1
1
0
1
0
0
0
1
0
0
1
0
1
0
1
0
0
0
1
0
0
1
0
0
0
3
4
8
16  
19  
20  
24  
27  
28  
30  
Cyclone III Device Handbook  
Volume 1  
July 2012 Altera Corporation  
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